Autumn has arrived right on schedule.
A weekend of come-and-go rain and high temperatures 10 to 20 degrees below normal is expected for Jackson County this weekend through Wednesday, weather officials said.
National Weather Service officials said a strong cold front that originated offshore is currently working its way inland and will drop precipitation on the Rogue Valley while temperatures plunge into the upper 60s and lower 70s. There's a chance Crater Lake could even see its first snow of the season, though meteorologists suspect it won't be much.
"The ground temperature's, right now, still really warm," said meteorologist Mike Petrucelli. "It's not to say we won't get anything, but if we get anything, it won't be a big significant snow up there — maybe barely just covering the ground."
Petrucelli described the front as "energetic," one that will bring rain showers and possibly an isolated thunderstorm or two.
"It won't be the norm; it will be the exception," Petrucelli said.
Moderate to heavy showers are expected to continue into Saturday as a trough of cooler air moves overhead. High temperatures are not expected to budge past the 60s. A normal high temperature this time of year is in the low 80s, the weather service website shows.
Sunday's daylight hours are expected to offer a break before another system rolls in during the late afternoon. Petrucelli said most of that system will be confined to Douglas and Coos counties.
"We may not get anything here other than some cloud cover," Petrucelli said.
Temperatures will remain cooler in Jackson County through Wednesday, when as much as half an inch of rain could fall in Medford and the surrounding area. By Thursday and Friday, daytime highs could warm back to nearly 80.
Petrucelli said travelers into Josephine and Douglas counties over the next few days should be mindful of the potential for flooding. Burn scars from recent fires make it harder for soils to absorb precipitation and flooding can result if the downpour is heavy enough.
"A lot of it's a function of how hard it rains in a short period of time," Petrucelli said.
— Ryan Pfeil